How did you find the 50D's??
I have basically worked my shortlist down to the Zulu and the 50D... I have trialled the Zulu, including a nice 2hour cross-country while getting my PPL unrestricted...
They were comfortable and very quiet, although the passive is almost worse than having no headset on! Sounds like you are in a 40 gallon drum with an O-235! Oh wait... I
was in a 152!
I guess the lesson there is, carry spare batteries!